Hi everybody,
I posted in Facebook group but for those who don’t join it, if it can be useful here you can find a breakdown to get a Rats Horde FX in Niagara inspired by “A Plague’s Tale” game, with just a bunch of custom graph… Very easy and can be recycled to other systems for insects… Hope you will like it! 
On my Artstation you can find some screens of the graphs: Artstation Niagara Rats Horde Breakdown